RV Park wifi signal

I live in & am assisting a RV park where a wifi network serves it's tenants. The main dsl receiver sets & transmits in the office which is in the center of the park. However due to trees, obstructions & a non reflective situation etc, the signal doesn't serve everyone in the park & is protected & opened by address #s from each tenant that's by the main system.

The idea is to install several amplified repeaters/antenna's without cables & powered by AC on the light poles within the outside diameters of the park that a signal will bounce from one to another from the main antenna. Can this be done? & what kind of quality & expense would this entail?
(Remember, The idea is not to run or bury feed cable) but to just grab no drop signals for everyone to use adequately. Any suggestions & the products needed???

Ron this can work but very iffy my I SUGGEST use your first repeater as
a access. point anther words connect your modem with use 6 par cable to
connect it too your first repeater from there provide all stand alone with
no longer then a 25foot line of sight and i do mean sight keep
all stand alone in sight with no more then 25 foot distance in all cases
hug

You could use a solution mesh (loop system) where those who are below the
network will connect and you can even use as a hotspot.The radios have an AP
and up to 10 nodes that talk to each other, the ability to 54Mbps within
the network, if a fade us another takes his way, he can ride on top of the
lamppost of the dealership.

I'm getting there lol The diameter range from the center rooftop transmitting pole antenna of the office is about 30' high & the distance within a 360* is about 500' in a circle.
Here's the closest I came up with... tell me what you think?

Description
Extend Your Wireless Network Range
Using this 802.11a Device as a Backbone
Extend your wireless network range with thisEnGenius EOC-5611P Business Class Outdoor Wireless 802.11a/b/g Dual Band High Power (600mW maximum) Access Point/Client Bridge/Client Router/WDS Bridge with embedded dual-polarity 14dbi(802.11a) Wireless Directional Patch Antenna and RP-SMA Connectors for 802.11a or 802.11b/g External Antennas. Note: An external antenna must be used if this device is used as an 802.11 b or g device. External antennas can provide increased range and and receive sensitivity. Also included is a Power Over Ethernet (PoE) device to meet your need for cable distance from the inside of your building to the device's outside installation (up to 300 feet or 90 meters). The device in a weatherproof enclosure (and a weatherproof cable accessory kit) offers a cost-effective solution as a Backhaul device to create Point-to-Point and Point to Multi-Point solutions.
It operates seamlessly in the 5GHz or 2.4GHz frequency spectrum and provides high bandwidth up to 54Mbps. The high transmit power and high receive sensitivity, extends wireless range and coverage to reduce roaming between access points and to get a more stable wireless connection. It also reduces the total costs of hardware ownership. With the new dual polarity antenna, users can utilize multi-polarization for best performance. It supports distance control by 1km to 30km and RSSI indicator, which enable the best transmit and receive signals for wireless communication. With the addition of a high-gain directional antenna and a clear unobstructed (no trees, buildings, poles, hills, etc) line-of-sight between nodes in a point-to-point configuration it is possible to achieve transmission up to 5 miles. This device is supplied with a PoE injector (24V) and a Power Adapter that allows AC input from 100-240 Volts to make outdoor deployment fast and easy in any part of the world. To protect your wireless connection, you can encrypt all wireless data with 64/128/152-bit WEP encryption or WPA2/WPA. MAC address filter allows user to select exactly which stations should have the access to your wireless network. In addition, user isolation function can protect the private network between client users. You can also configure the device to use up to 4 different SSIDs. This device increases the effective range and coverage area of a 802.11a or b or g network. When used with other 802.11a devices (or as a Backhaul device with the EnGenius EOR-7550) you can create a powerful and effective point-to-point or point-to-multi-point network. This unit is Brand New and comes with an EnGenius 12-month limited warranty and we provide free on-line email technical support.

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Since you are going to try to do this on the low cost end of the spectrum, visit http://www.open-mesh.com/ and have a look at how to setup a mesh network. Remember that this shared infrastructure will limit the total available bandwidth to about 50% of the DSL line. If you can setup QoS to limit each user to not more than 50% of the available bandwidth, that will limit the heavy downloaders from sapping all the capacity of the network.

Make sure each user's private network is connected through a NATed router so their computers are a little bit secure. So each user (home or office) would be connected like this.

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